Long ago, have developed a system to can not contact, now the supplier on the client side to write a script, is take the serial number (the serial port is a scanning gun) on the input data to the server database,


Now I'd like to add a scanning gun, that is to say two serial number can be assigned to the database, I don't want to change on the server side program, besides, I also dare not, wrong is very trouble, who can help me write paragraph congfig file code,
I am a layman, I think it should be first blind & lt; The add key="serial number. A" value="https://bbs.csdn.net/topics/com9"/& gt;

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